90 IROC Camaro Speed density
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90 IROC Camaro Speed density
Were all 90 model tuned port engines utliizing the speed density system? have looked at a 90 IROC that has been setting for 20 years after being in an accident, it should be the spped density setup from what I have read, this one is not it has the MAFs system, no MATS sensor on the plenum and no holes to install. Has anyone else seen this on a 90 model
Joined: Dec 2004
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From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: 90 IROC Camaro Speed density
90-92 f body and 90-91 y body were speed density. All tpi units used a mat or iat.
if it doesn’t have a ninth injector and a maf it would be from a 89. 85-88 used a ninth injector on the drivers side.
If the ecm is still in the car the computer chip has 3-4 letters on it. This would identify what year engine size and transmission used.fo example a 90 tpi sd 350 automatic would be anjf. 91-92 is aujp.
if it doesn’t have a ninth injector and a maf it would be from a 89. 85-88 used a ninth injector on the drivers side.
If the ecm is still in the car the computer chip has 3-4 letters on it. This would identify what year engine size and transmission used.fo example a 90 tpi sd 350 automatic would be anjf. 91-92 is aujp.
Last edited by Tuned Performance; Oct 15, 2018 at 09:41 PM.
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